di1={'name':'tom','age':20}
di2={}
di2['name']='cheney'
di2['age']=21
di2['num1']=15258999920
#print(di2)

del di2['name']
#print(di2)

di2['age']=32
#print(di2)

print(di2.keys())
print(di2.items())
for key,value in di2.items():
    print(f'{key}:{value}')
    












